Accident Tolerant Fuels (ATF-1) Irradiation Tests: overview of the ongoing post-irradiation examinations

摘要

The current status of post-irradiation examinations (PIEs) of the ATF-1 test series is presented. Samples of UO_2 including additives, namely SiC whiskers and diamond, and U_3Si_2 have been irradiated at A TR to low burnup. Both destructive and non-destructive PIE data has been collected for the various fuel systems. The results show a strong impact of the additives on the UO_2 microstructure, penalizing the fuel microstructure stability. The nondestructive examination and the first metallographic data of U_3Si_2 fuel show good irradiation performance of the fuel, at least at low burnup. Further data collection on those samples will complete these results.